<template>
  <div>
    <ul>
       <li v-for="(item,index) in myArr" :key="index">
        {{item}}
       </li>
    </ul>
    <button @click='fn'>走一走</button>
  </div>
</template>

<script>
export default {
   data(){
    return {
      myArr:['帅哥','美女','程序员']
    }
   },
   methods:{
    fn() {
      this.myArr.push(this.myArr[0])
     this.myArr.shift()


    }

   }
}
</script>

<style>

</style>